Second American Dendrochronology Conference

Second American Dendrochronology Conference

Second American Dendrochronology
Conference
Contribution ID : 115
Climatic change responses of
Machaerium scleroxylon from the
Bolivian tropical dry forest. A new
dendrochronological species.
Content :
Machaerium scleroxylon is an important timber species from the lowland tropical dry
forests in Bolivia. We used dendrochronological methods to (i) evaluate the responses
of radial growth to climate and atmospheric circulation patterns; and (ii) quantify
the growth rate in order to estimate the age of optimal harvest rotation. We
collected ten wood disks taken from mature individuals randomly selected. Despite the
existence of false rings, lenses and wedging rings, the species showed clearly annual
ring boundaries. Correlations between residual ring-width indices and monthly
climatic variables (mean, maximum and minimum temperatures and precipitation) and El
Niño-Southern Oscillation index were calculated. We also defined the minimum age to
harvest upper 100-120 years. Growth showed a significant positive correlation with
monthly precipitation and a negative correlation with mean temperatures during the
late rainy season. A positive correlation between ring width and ENSO indices
indicated that the growth of M. scleroxylon was significantly affected by regional
atmospheric circulation patterns.
Primary authors : Mrs. PAREDES VILLANUEVA, Kathelyn (CTAF Project - Universidad
Autónoma Gabriel René Moreno (Bolivia)/Universidad de Córdoba (Spain)) ; Dr.
SANCHEZ-SALGUERO, Raul (INIA-CIFOR)
Co-authors : Mr. DELGADO MANZANEDO, Rubén (Univerdad de Córdoba) ; Mr. QUEVEDO
SOPEPI, Roberto (Universidad Autónoma Gabriel René Moreno) ; Mr. PALACIOS,
Guillermo (IDAF - Universidad de Córdoba) ; Mr. NAVARRO CERRILLO, Rafael
(Universidad de Córdoba)
Presenter : Mrs. PAREDES VILLANUEVA, Kathelyn (CTAF Project - Universidad Autónoma
Gabriel René Moreno (Bolivia)/Universidad de Córdoba (Spain)) ; Dr.
SANCHEZ-SALGUERO, Raul (INIA-CIFOR)
Session classification : Tropical Dendrochronology
Track classification : Tropical dendrochronology
Type : Oral Presentation